Ukuqonda Indlela Ukuguqulwa Kwangasiza Ngayo Ukuthuthukisa Umbono
Ungase uzwe amagama athi "ukufakelwa kweso" asetshenziswe iziguli, kodwa ukuhlinzwa okuyiwona okwenziwe ukuguqulwa kweso akunakwenzeka. Iliso lonke alikwazi ukuthathwa kusuka kumuntu oyedwa futhi liphinde lafakwa komunye umuntu ukuze kuthuthukiswe umbono. Lokho kusebenza ngokuguqula izidumbu nezinye izicubu, kodwa akunakwenziwa ngeso lonke ngezokwelapha namasu okwamanje.
Njengamanje, inqubo yokufakelwa kweso kuphela ekhona yilelo ukufakelwa kwe- cornea , okufaka esikhundleni se-cornea ezigulayo nge-cornea enikelwe ngumnikeli oshonile. Ukufakelwa kwe-cornea kungaveza izinguquko ezimangalisayo embonweni. Eqinisweni, abanye abantu bangaba yimpumputhe ngokomthetho ngaphambi kokuhlinzwa futhi bathole umbono wabo ngo 20/20 ngemuva kokufakelwa kwe-cornea.
Ngokungafani nokuguqulwa komzimba, abantu abathola ukufakelwa kwe-cornea akudingi imithi yokulwa nokulahlwa ukugcina ukufakelwa kwabo kwe-cornea.
I-Cornea
I-cornea iyisisindo esiyingqayizivele nesicacile phambi kweso elidlala indima ekusizeni izithombe ezigxilwe amehlo. Ukukhanya kufanele kudlule i-cornea ukuze ubuchopho busebenze ngendlela yokubona, ngakho-ke i-cornea icacile uma iphilile. Yakhiwa ngamatje ayisithupha. Izendlalelo, kusukela ngaphandle kweso kuze kube ngaphakathi, ziyi: epithelium, ungqimba lukaBowman, i-stoma, isendlalelo sikaDua, isikhumba seDescemet, i-endothelium.
Lezi zigaba zisebenza ndawonye ukuze zithuthukise umbono, kodwa uma ziba namafu noma zihlukunyezwa, umbono wehle kakhulu futhi ungaholela ekumpumpheni okusebenzayo ngokuhamba kwesikhathi.
I-cornea inekhwalithi eyodwa ehlukile kakhulu: ayinayo igalelo layo. Izicubu zomzimba ngokuvamile zondliwa umoya we-oksijini kanye nokudla okudingayo ngegazi eliphethwe yinhliziyo.
Izidingo ze-cornea zihlangana ngokuxhumana nama-vitreous amahlaya, amanzi amanzi agcwalisa iso. Lokhu kungenalo ukunikezwa kwegazi okuvumela ukuthi i-cornea ibekwe kalula, ngoba ayikho imithwalo yegazi encane okumelwe ibuyiswe kabusha ku-cornea ngemuva kokukhipha i-cornea eyodwa futhi enye ibekwe esikhundleni sayo.
Ukunikeza i-Cornea
Izindaba ezinhle ukuthi kubantu abaningi, ukufakelwa kwe-cornea kungasho ukuthuthukiswa okukhulu embonweni. Ngokungafani nezitho, abantu abaningi abangakwazi ukuzinikela lapho befa, abantu abaningi bayakwazi ukunikela nge-corneas yabo yokufakelwa kabusha. Izimo nezifo eziningi okwenza kube nzima ukunikela izitho noma ezinye izicubu, njengomdlavuza, akuvimbeli ukunikela ngemali ye-corneas.
Ikusasa Lonke Ukufakelwa Kwamehlo
Ososayensi nabacwaningi bezokwelapha abalindeli ukuthi ukuhlinzwa kokuqanda kwamehlo okuphelele kungenzeka esikhathini esizayo esiseduze. Ukufakelwa kweqiniso kwangempela kuzodinga ukuhlukanisa nokubuyisela kabusha i-nertic optic, engaphezu kwamandla okwamanje abahlinzayo.
Kungase kube amashumi eminyaka noma ngisho namakhulu eminyaka ngaphambi kokuba ubuchwepheshe bokuhlinza buhlinzekwe ngendlela enesibindi futhi ehilelekile, futhi kuze kube yileso sikhathi ezinye izinhlobo zokwelapha zombono zizosetshenziselwa ukuphatha izimo zamehlo.
Imithombo:
Amaqiniso nge-Cornea ne-Cornea Disease. I-National Eye Institute. NgoJanuwari 2011. http://www.nei.nih.gov/health/cornealdisease/#4